starfish

Hello, I've had a 125Gal Saltwater tank that has been running for over 2 months. I would like to add a starfish to my tank. I was wondering what would be the best starfish to add when having a reef tank with Tang, Clownfish?

I have a sand sifting starfish and I’m wondering why my aquarium supply store near my house doesn’t sell small mussels/clams etc. as live feed since my starfish is supposed to be eating that along with other stuff like urchins? And it sort of looks like it is skinny? Idk am i just being...

Ok, so I got a starfish from my friend she didn't tell me what kind of starfish it is yet I want to know because I want to be able to care for it correctly. It is black has 5 skinny arms that are all different sizes like from the range of 2 to 3 inches and its disc is about the size of a dime...

I've had my tank up for about 2 weeks now and I'm just now starting to see hitchhikers from the LR.. Can anyone tell me what exactly that is under the rock? It looks like a starfish to me but I have no idea? It was sitting on top of the rock last night..